Answer:
"It regulates the postal service."
Step-by-step explanation:
"It regulates the postal service."
The legislative branch in the United States, also known as Congress, has the authority to regulate the postal service. This power is explicitly stated in the U.S. Constitution in Article I, Section 8, Clause 7, often referred to as the Postal Clause, which grants Congress the power "To establish Post Offices and post Roads."